Spi 19-481-1 Class Zz Minus Plug Pin Gage 0.481 Inch

Product Description

The SPI 19-481-1 is a Class ZZ minus plug pin gage ground to a nominal diameter of 0.481 inches with a minus tolerance of 0.0002 inches. Plug pin gages in Class ZZ are the standard go/no-go inspection tool for checking hole sizes, bore diameters, and machined apertures in production and quality-control environments. The steel construction provides the hardness and wear resistance required for repeated use on metal workpieces. Machinists, quality technicians, and toolroom personnel use this gage to verify that a drilled, reamed, or bored hole falls within the specified dimensional tolerance.

This gage is suited for use in machine shops, manufacturing plants, and inspection departments where dimensional verification of 0.481-inch nominal holes is required. It is commonly used during in-process inspection on CNC machining centers and manual lathes, as well as in final quality checks before part acceptance. The minus designation means the gage diameter is ground below nominal, confirming the go-gage application for minimum material condition checks.

Key Features

• Class ZZ tolerance class for standard production and inspection use
• Minus plug configuration ground below nominal diameter
• 0.481-inch nominal diameter for common bore inspection applications
• 0.0002-inch tolerance for precise dimensional verification
• Steel construction for hardness and long service life

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with handle sets and gage holders compatible with 0.481-inch diameter plug gages in production and quality inspection applications.

Installation Notes

Plug pin gages are handled and used by quality technicians and machinists and require no permanent installation. Clean the gage and the hole to be measured before use to prevent debris from affecting the reading. Store the gage in its protective case when not in use to prevent nicks or surface damage that would compromise accuracy. Periodic calibration against traceable standards is recommended to maintain measurement integrity.